/*
 * Copyright 2020 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.stunner.core.client.canvas.controls.keyboard;

import java.util.Optional;

public interface KeyEventHandler {

    KeyEventHandler addKeyShortcutCallback(final KeyboardControl.KeyShortcutCallback shortcutCallback);

    void clear();

    void setEnabled(boolean enabled);

    default KeyEventHandler setTimerDelay(int delay) {
        return this;
    }

    default Optional<KeyboardControl.KogitoKeyShortcutCallback> getAssociatedKogitoKeyShortcutCallback(final KeyboardControl.KeyShortcutCallback shortcutCallback) {
        if (shortcutCallback instanceof KeyboardControl.KogitoKeyShortcutCallback) {
            return Optional.of((KeyboardControl.KogitoKeyShortcutCallback) shortcutCallback);
        }

        if (shortcutCallback instanceof KeyboardControlImpl.SessionKeyShortcutCallback && ((KeyboardControlImpl.SessionKeyShortcutCallback) shortcutCallback).getDelegate() instanceof KeyboardControl.KogitoKeyShortcutCallback) {
            return Optional.of((KeyboardControl.KogitoKeyShortcutCallback) ((KeyboardControlImpl.SessionKeyShortcutCallback) shortcutCallback).getDelegate());
        }

        return Optional.empty();
    }
}
